You know your writer friends? The ones you know from that conference you've been going to for a decade? The people you know from that writing bulletin board on line? The folks from the Yahoo community you joined way back when? The people in that professional organization who have rooted for you during the writing, selling, and publishing of your novel?
Those people won't buy your book.
I hate to be the bearer of bad news, and it certainly surprised me. Now, the people in your real-life, face-to-face writing group probably will buy your book. Because there you are every week. You saw their new SUV and heard about the cruise they took the family on last fall. They will probably have a tough time avoiding coughing up $25 for your opus. But those online folks? The people you see once a year at that conference? They are not buying.
The reason (or at least the excuse) for that, at present, is obvious. All the writers you know are now turbo-poor. Or at least they can claim it until they pull up to the conference this spring in this year's new SUV.
The real reason? Too many would-be writers don't read any more than anybody else. Sorry, but there it is.
Someday I'll try to come up with a happy secret for you.